%0 Journal Article
%A P. V. Roldugin
%T On the number of subsets of the residue ring such that the difference of any pair of elements is not invertible
%J Diskretnaya Matematika
%D 2016
%P 122-138
%V 28
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DM_2016_28_4_a9/
%G ru
%F DM_2016_28_4_a9